题1、查询Student表中得所有记录得Sname、Ssex与Class列。
2、查询教师所有得单位即不重复得Depart列。
3、查询Student表得所有记录。
4、查询Score表中成绩在60到80之间得所有记录。
5、查询Score表中成绩为85,86或88得记录。
6、查询Student表中“95031”班或性别为“女”得同学记录。
7、以Class降序查询Student表得所有记录。
8、以Cno升序、Degree降序查询Score表得所有记录。
9、查询“95031”班得学生人数。
10、查询Score表中得最高分得学生学号与课程号。
11、查询‘3-105’号课程得平均分。
12、查询Score表中至少有5名学生选修得并以3开头得课程得平均分数。
13、查询最低分大于70,最高分小于90得Sno列。
14、查询所有学生得Sname、Cno与Degree列。
15、查询所有学生得Sno、Cname与Degree列。
16、查询所有学生得Sname、Cname与Degree列。
17、查询“95033”班所选课程得平均分。
18、假设使用如下命令建立了一个grade表:create table grade(low numeric(3,0),upp numeric(3),rank char(1));insert into grade values(90,100,'A');insert into grade values(80,89,'B');insert into grade values(70,79,'C');insert into grade values(60,69,'D');insert into grade values(0,59,'E');现查询所有同学得Sno、Cno与rank列。
19、查询选修“3-105”课程得成绩高于“109”号同学成绩得所有同学得记录。
20、查询score中选学一门以上课程得同学中分数为非最高分成绩得记录。
21、查询成绩高于学号为“109”、课程号为“3-105”得成绩得所有记录。
22、查询与学号为108得同学同年出生得所有学生得Sno、Sname与Sbirthday列。
23、查询“张旭“教师任课得学生成绩。
24、查询选修某课程得同学人数多于5人得教师姓名。
25、查询95033班与95031班全体学生得记录。
26、查询存在有85分以上成绩得课程Cno、27、查询出“计算机系“教师所教课程得成绩表。
28、查询“计算机系”与“电子工程系“不同职称得教师得Tname与Prof。
29、查询选修编号为“3-105“课程且成绩至少高于选修编号为“3-245”得同学得Cno、Sno与Degree,并按Degree从高到低次序排序。
30、查询选修编号为“3-105”且成绩高于选修编号为“3-245”课程得同学得Cno、Sno与Degree、31、查询所有教师与同学得name、sex与birthday、32、查询所有“女”教师与“女”同学得name、sex与birthday、33、查询成绩比该课程平均成绩低得同学得成绩表。
34、查询所有任课教师得Tname与Depart、35 查询所有未讲课得教师得Tname与Depart、36、查询至少有2名男生得班号。
37、查询Student表中不姓“王”得同学记录。
38、查询Student表中每个学生得姓名与年龄。
39、查询Student表中最大与最小得Sbirthday日期值。
40、以班号与年龄从大到小得顺序查询Student表中得全部记录。
41、查询“男”教师及其所上得课程。
42、查询最高分同学得Sno、Cno与Degree列。
43、查询与“李军”同性别得所有同学得Sname、44、查询与“李军”同性别并同班得同学Sname、45、查询所有选修“计算机导论”课程得“男”同学得成绩表下面就是参考答案:SQL语句练习题参考答案1、select sname,ssex,class from student;2、select distinct(depart) from teacher;orselect distinct depart from teacher;3、select * from student;4、select * from score where degree between 60 and 80;orselect * from score where degree>=60 and degree<=80;5、select * from score where degree in (85,86,88);orselect * from score where degree=85 or degree=86 or degree=88;6、select * from student where class=95031 or ssex='女';7、select * from student order by class desc;8、select * from score order by cno asc,degree desc;orselect * from score order by cno,degree desc;9、select count(*) from student where class=95031;orselect count(sno) from student where class=95031;10、select Sno as '学号',cno as '课程号', degree as '最高分' from score where degree=(select max(degree) from score);11、 select avg(degree) from score where cno='3-105';12、select cno,avg(degree) from score where cno like '3%' group by cno having count(sno)>5;orselect cno,avg(degree) from score where cno like '3%' group by cno having count(*)>5;13、select sno from score group by sno having min(degree)>70 and max(degree)<90;14、select student、sname,scoreo,score、degree from student,score where student、sno=score、sno; orselect sname,cno,degree from student,score where student、sno=score、sno;orselect x、sname,yo,y、degree from student x,score y where x、sno=y、sno;15、Select score、sno,courseame,score、degree from score,course where scoreo=courseo;orselect sno,cname,degree from score,course where scoreo=courseo;orselect x、sno,yame,x、degree from score x,course y where xo=yo;16、select student、sname,courseame,score、degree from student,course,score where student、sno=score、sno and courseo=scoreo;orselect sname,cname,degree from student,course,score where student、sno=score、sno and courseo=scoreo;orselect x、sname,yame,z、degree from student x,course y,score z where x、sno=z、sno and yo=zo;17、select cno,avg(degree) from score,student where student、sno=score、sno and class=95033 group by cno;orselect yo,avg(y、degree) from student x,score y where x、sno=y、sno and x、class=95033 group by yo;18、select sno,cno,rank from score,grade where degree between low and upp [order by rank]; [ ]表示可有可无19、select * from score where cno='3-105' and degree>(select degree from score where sno='109' and cno='3-105');orselect x、* from score x,score y where xo='3-105' and x、degree>y、degree and y、sno='109' and yo='3-105';20、分析:1、成绩非本科最高select * from score where degree not in (select max(degree) from score group by cno)选学一门以上得学生成绩:select sno from score group by sno having count(*)>1;2、查询成绩非本科最高并且选1门以上得学生得成绩:select * from score where degree not in(select max(degree) from score group by cno) group by sno having count(*)>1;orselect * from (select * from score where degree not in(select max(degree) from score group by cno)) as aa group by sno having count(*)>=2;通用答案:select sno from( select * from scorewhere degree not in(select max(degree) from score group by cno)) as aa group by sno having count(*)>=2;21、select * from score where degree>(select degree from score where sno=109 and cno='3-105'); orselect x、* from score x,score y where x、degree>y、degree and y、sno=109 and yo='3-105';22、select sno,sname,sbirthday from student where year(sbirthday)=(select year(sbirthday) from student where sno=108);23、select * from score where cno in(select cno from course where tno=(select tno from teacher where tname='张旭'));orselect cno,sno,degree from score where cno=(select xo from course x,teacher y where x、tno=y、tno and y、tname='张旭');24、select tname from teacher where tno in (select x、tno from course x,score y where xo=yo and yo in (select cno from score group by cno having count(*)>5));orselect tname from teacher where tno in(select tno from course where cno in(select cno from score group by cno having count(*)>5));orselect tname from teacher where tno in(select x、tno from course x,score y where xo=yo group by x、tno having count(x、tno)>5);25、select * from student where class in ('95033','95031');orselect * from student where class=95033 or class=95031;26、select distinct cno from score where degree in (select degree from score where degree>85);27、select * from score where cno in (select cno from course where tno in (select tno from teacher where depart='计算机系'));orselect * from score where cno in(select xo from course x,teacher y where y、tno=x、tno and y、depart='计算机系');28、select tname,prof from teacher where depart='计算机系' and prof not in (select prof from teacher where depart='电子工程系');29、select * from score where cno='3-105' and degree>(select min(degree) from score wherecno='3-245') order by degree desc;orselect * from score where cno='3-105'and degree>any(select degree from score where cno='3-245') order by degree desc;30、select * from score where cno='3-105' and degree>(select max(degree) from score wherecno='3-245');orselect * from score where cno='3-105' and degree>all(select degree from score wherecno='3-245');31、select sname as name,ssex as sex,sbirthday as birthday from studentunionselect tname,tsex,tbirthday from teacher;32、select sname as name,ssex as sex,sbirthday as birthday from student where ssex='女' unionselect tname,tsex,tbirthday from teacher where tsex='女';33、select * from score a where degree<(select avg(degree) from score b where ao=bo);34、 select tname,depart from teacher where tno in(select tno from course);35、 select tname,depart from teacher where tno not in (select tno from course);36、select class from student where ssex='男' group by class having count(sno)>=2;37、 select * from student where sname not like '王%';38、select sname as '姓名',2010-year(sbirthday) as '年龄' from student;39、select sbirthday from student where sbirthday in (select min(sbirthday) from student) unionselect sbirthday from student where sbirthday in (select max(sbirthday) from student); orselect sbirthday from student where sbirthday=(select min(sbirthday) from student) or sbirthday=(select max(sbirthday) from student);40、select * from student order by class desc,sbirthday;41、select cname,tname from course,teacher where course、tno=teacher、tno and tsex='男';orselect courseame,teacher、tname from course,teacher where course、tno=teacher、tno and tsex='男';orselect cname,tname from course x,teacher y where x、tno=y、tno and y、tsex='男';orselect x、tname,yame from teacher x,course y where x、tno=y、tno and x、tsex='男';42、 select * from score where degree in (select max(degree) from score);43、select sname from student where ssex=(select ssex from student where sname='李军');44、 select sname from student where ssex=(select ssex from student where sname='李军') and class=(select class from student where sname='李军');45、select * from score where sno in(select sno from student where ssex='男') and cno in(select cno from course where cname='计算机导论');注意:20题得前两个答案在sql server 中不支持,在mysql中支持如果题答案中有错误,请记得及时通知我让我纠正错误！我得邮箱地址:。